{"id":"CVE-2026-89628","title":"kernel: HID: picolcd: clamp eeprom debugfs read to bytes actually received (CVE-2026-89628)","summary":"A flaw was found in the Human Interface Device (HID) picolcd driver in the Linux kernel. A local attacker with root privileges, by using a specially crafted or spoofed picoLCD device, could exploit an out-of-bounds read vulnerability in th…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-805","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-18","sourceUpdated":"2026-09-18T22:37:18+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89628.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89628.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89628"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532179"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89628"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89628"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89628.mbox"},{"url":"https://git.kernel.org/stable/c/471f4a939c66d1d44aece2321807abf609fc9098"},{"url":"https://git.kernel.org/stable/c/699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84"},{"url":"https://git.kernel.org/stable/c/a3e6e8d7198a9f3861861520a38b673684a1062b"},{"url":"https://git.kernel.org/stable/c/e9c667395ac1f8024f623250b32bae4c7af9caa0"},{"url":"https://git.kernel.org/stable/c/1a02056c2bf7ef9b5fd05ee6913aeeadb703c443"},{"url":"https://git.kernel.org/stable/c/65daa322f1021d8206f8032c4cd4c0cb2d26c7c3"},{"url":"https://git.kernel.org/stable/c/8dc662af019158690c470edd2e2857657f700abb"},{"url":"https://git.kernel.org/stable/c/4daf432c94a42e7be6aa10b012b33af5ed9bc118"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.0022,"epssPercentile":0.12701,"ingestedAt":"2026-09-14T15:23:07.450Z","slug":"CVE-2026-89628","body":"## Overview\n\nA flaw was found in the Human Interface Device (HID) picolcd driver in the Linux kernel. A local attacker with root privileges, by using a specially crafted or spoofed picoLCD device, could exploit an out-of-bounds read vulnerability in the picolcd_debug_eeprom_read() function. This flaw occurs because the function trusts a device-supplied length without proper validation against the actual received data size. Successful exploitation could lead to the disclosure of sensitive information from adjacent kernel memory to userspace.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89628.json)\n\n**kernel: HID: picolcd: clamp eeprom debugfs read to bytes actually received** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":208069,"id":"CVE-2026-89628","ts":1789922704205,"field":"cvss","old":"5.4","new":"5.5"},{"seq":204065,"id":"CVE-2026-89628","ts":1789490231280,"field":"cvss","old":null,"new":"5.4"},{"seq":204064,"id":"CVE-2026-89628","ts":1789490231280,"field":"severity","old":"none","new":"medium"},{"seq":147606,"id":"CVE-2026-89628","ts":1789270211571,"field":"cvss","old":null,"new":"5.4"},{"seq":147605,"id":"CVE-2026-89628","ts":1789270211571,"field":"severity","old":"none","new":"medium"},{"seq":109360,"id":"CVE-2026-89628","ts":1789183731607,"field":"cvss","old":null,"new":"5.4"},{"seq":109359,"id":"CVE-2026-89628","ts":1789183731607,"field":"severity","old":"none","new":"medium"}]}